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\begin{document}

\begin{figure}
\centering
\subfigure[]{
\includegraphics[width=0.3\textwidth]{powertestA700.eps}
}
\subfigure[]{
\includegraphics[width=0.3\textwidth]{powertestA5000.eps}
}
\subfigure[]{
\includegraphics[width=0.3\textwidth]{powertestA130000.eps}
}
\subfigure[]{
\includegraphics[width=0.3\textwidth]{powertestC3500.eps}
}
\subfigure[]{
\includegraphics[width=0.3\textwidth]{powertestC34000.eps}
}
\subfigure[]{
\includegraphics[width=0.3\textwidth]{powertestC368000.eps}
}
\subfigure[]{
\includegraphics[width=0.3\textwidth]{powertestE6.eps}
}
\subfigure[]{
\includegraphics[width=0.3\textwidth]{powertestE8.eps}
}




\end{figure}

\end{document}
